Improvement in flour-sifters



UNrrEn S'rnrns CHARLES RICHARDSON, OF PHILADELPHIA, PENNSYLVANIA.

IMPROVEMENT IN FLOUR-SIFTERS.

Specification forming part of Letters Patent No. 121,197, dated November21, 1871.

To all whom it may concern:

Be it known that I, CHARLES RICHARDSON, of Philadelphia, county ofPhiladelphia and State of Pennsylvania, have invented an ImprovedFlour-Sitter, of Which the following is a speciiication:

My invention relates to certain improvements in flour-sifters, too fullydescribed hereafter to need preliminary explanation.

Figure lis a longitudinal sectional view of my improved flour-sitter,and Fig. 2 a transverse sec- .V-tion ofthe same on the line 1 2, Fig. 2.

A is a box formed with an internal partition, B, and having two hingedlids, C and D, the latter of Which closes upon the former, and both ofwhich are arranged to be secured wh en closed by hooks or fastenings c.A hopper, E, is secured to the top of the lid C, and directly beneaththe opening in the bottom of the said hopper are two crushing-rollers, FF, the journals of which turn in suitable bearing in the opposite endsof the lid. The crushing-rollers are covered with leather or othersuitable material, b, at points directly beneath the hopper, and aregeared together at one end within the compartment X of the box bycog-wheels d d. vOne of these cog- Wheels gears into and receives itsmotion from a larger cog-Wheel, f, on the driving-shaft G, which turnsin the partition B and end h of the box, and is provided at its outerend with an operating crank, z'. The driving-shaft has also within thecompartment X of the box a large bevel- Wheel, j, which gears into asmall horizontal bevel-wheel, k, hung to a short spindle, Z, the latterhaving its bearings in the bottom of the box and in a fixed cross-piece,L. At the upper end of the spindle Z is a crank, m, a shortconnecting-rod, p, from which extends through an opening in thepartition B, and is attached to one end or side of a sieve-frame, H,contained Within the compartment Y of the box, beneath thecrushing-rolls, and which rests upon and is guided by wheels, q, securedto the sides of the box. The sieve proper is detachable from the ated,the crushing-rolls being simply rotated,

while a rapid reciprocating movement, With a slight jerk at thetermination of each stroke, is

imparted to the sieve. The Hour is fedin properv quantities into thehopper E and passes from the same between the rolls, Which effectuallycrush all lumps, 85o., it passing thence into and through thereciprocating-sieve, by which it is thoroughly cleansed of particles offoreign matter.

I have ascertained that by this combination of crushing-rolls andrapidly-reciprocating sieve our can be cleansed and deprived of lumpsmuch more quickly and thoroughly than by the ordinary means. I have alsoascertained that a jerking motion sufficient to prevent the clogging ofthe sieve can be much more readily imparted to the latter by a shortconnecting-rod and rapidly-revolving crank than by any other means.

It will be observed that the Whole of the gearing by which motion istransmitted from the driving-shaft to the crushing-rollers and sieve isseparated from the latter by the partition B, the said gearing being, infact, contained Within a separate compartment formed in the box for itsreception. Ihis arrangement prevents the clogging of the wheels by theflour and the tainting of the latter by coming in contact With the saidwheels, which, in order to run freely, must be lubricated. The adheringof iiour to the crushing-rolls is prevented by doctors or scrapers t t(Fig. 2) bearing against each of the said rolls; and the latter can belifted with the lid C when it is necessary to cleanse them or When it isdesired to obtain access to the sifting-frame. The sieve beingdetachable from its frame, as before mentioned, can be lifted entirelyout of the box without disturbing or disconnecting the said frame fromthe rod p.

I claim- 1. The box A provided with the partition B and hopper E, incombination With the crushingrolls F F, reciprocating sieve S, andoperatinggear described, or its equivalent, all arranged and operatingsubstantially as and for the purpose set forth.

2. The box H, in combination With the detachable receptacle I, having atthe bottom a sieve, s, for the purpose specified. n

In testimony whereof I have signed my name to this speciiication in thepresence of two sub- CHAS. RICHARDSON.

scribing Witnesses.

Witnesses WM. A. STEEL, J oHN K. RUPERTUS. (57)

